12v electric socket ignition power cut, ignition wire

[CIK7]

I have been trying to wrap my head around this one. I cant figure out where the 12v socket wiring goes after going from socket to fuse. Ive tried tracing it but to no avail. How would i cut all power (past the fuse) to the 12v? But i want an alternative to doing that. So with that in mind, does anybody know if one of the purple wires in slot #13 (20A fuse) is ignition for the 12v? There are 4 purples close together but only 3 are side by side. Fuse #13 has 1 medium and 1 small squished together, then a medium right next to it. I wonder if the small one is the ignition? Please refer to the picture of fusebox for this. What is the yellow wire for on the rear 12v? I thought it was ignition but i cut it and the socket still only works on ignition power. Please refer to picture of wire harness for this.
Basically i want all 12v sockets to stay on even after ignition power off.